/Engine/Source/Runtime/Renderer/Public/FXRenderingUtils.h
Utility to determine if a material might render before the FXSystem's PostRenderOpaque is called for the view family
static bool CanMaterialRenderBeforeFXPostOpaque ( const [FSceneViewFamily](API\Runtime\Engine\FSceneViewFamily) & ViewFamily, const [FPrimitiveSceneProxy](API\Runtime\Engine\FPrimitiveSceneProxy) & SceneProxy, const [FMaterial](API\Runtime\Engine\FMaterial) & Material )